[shrimps]

Flower picking I get I think 24$ per bouquet, and it actually makes a lot of money. I just buy flowers off people I think it was like 3$ per flower, and just make bouquets.

As for grinding rocks, I got blue to change the way it outputs the minerals, so now you wont hit the level cap of NPCs.
There's a limit to how many NPCs can be in a level, I believe it's around 500-600. So it's easy to hit it if you're grinding thousands of rocks.
It shouldn't really be an issue to hit that cap any more with the new change. But they will still despawn after 5 minutes I believe.